<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单</title>
</head>
<body>
    <form action="https://baidu.com/s" target="_blank">
        <input type="text" placeholder="输入搜索内容" name="wd">
        <button>确认</button>
    </form>
    <hr>
    <form action="https://search.jd.com/search" target="_blank">
        <input type="text" name="keyword" placeholder="jd">
        <button>确认</button>
    </form>
    <hr>
    <form action="https://cn.bing.com/search" target="_blank">
        <input type="text" name="q" placeholder="bing 搜索">
        <button>确认</button>
    </form>

</body>
</html>